Determination of Mining Width in Strip Mining Based on Plate Failure Theory

In order to determine Zhaozhuang No.2 Coal Mine strip mining size in "three unders" coal seam and liberate sluggish coal as much as possible under the premise of guaranteeing safety. The paper takes trial mining area for example, using the fixed Marcus simple formula and the RFPA numerical simulation to analyze the mining width of strip mining on the basis of determining key loading strata, apply strip mining in the trial mining area, and measure surface subsidence.